﻿<html xmlns="http://www.w3.org/1999/xhtml" lang="zh-CN">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>css菜单演示</title>
<style type="text/css">
<!--
*{margin:0;padding:0;border:0;}
body {
        font-family: arial, 宋体, serif;
        font-size:12px;
}
#nav {
         line-height: 24px; list-style-type: none; background:#666;
}
#nav a {
        display: block; width: 80px; text-align:center;
}
#nav a:link {
        color:#666; text-decoration:none;
}
#nav a:visited {
        color:#666;text-decoration:none;
}
#nav a:hover {
        color:#FFF;text-decoration:none;font-weight:bold;
}
#nav li {
        float: left; width: 80px; background:#CCC;
}
#nav li a:hover{
        background:#999;
}
#nav li ul {
        line-height: 27px; list-style-type: none;text-align:left;
        left: -999em; width: 980px; position: absolute; float:left;
}
#nav li ul li{
        float: left; width: 80px;
        background: #F6F6F6; 
}
#nav li ul a{
        display: block; width: 80px;text-align:center;
}
#nav li ul a:link {
        color:#666; text-decoration:none;
}
#nav li ul a:visited {
        color:#666;text-decoration:none;
}
#nav li ul a:hover {
        color:#F3F3F3;text-decoration:none;font-weight:normal;
        background:#C00;
}
#nav li:hover ul {
        left: 0;
}
#nav li.sfhover ul {
        left: 0;
}
#content {
        clear: left; 
}
-->
</style>
<script type=text/javascript><!--//--><![CDATA[//><!--
function menuFix() {
        var sfEls = document.getElementById("nav").getElementsByTagName("li");
        for (var i=0; i<sfEls.length; i++) {
                sfEls[i].onmouseover=function() {
                this.className+=(this.className.length>0? " ": "") + "sfhover";
                }
                sfEls[i].onMouseDown=function() {
                this.className+=(this.className.length>0? " ": "") + "sfhover";
                }
                sfEls[i].onMouseUp=function() {
                this.className+=(this.className.length>0? " ": "") + "sfhover";
                }
                sfEls[i].onmouseout=function() {
                this.className=this.className.replace(new RegExp("( ?|^)sfhover\\b"),"");
                }
        }
}
window.onload=menuFix;
//--><!]]></script>
</head>
<body>
<ul id="nav">
<li><a href="#">菜单一级</a>
        <ul>
        <li><a href="#">菜单一级</a></li>
        <li><a href="#">菜单一级</a></li>
        <li><a href="#">菜单一级</a></li>
        <li><a href="#">菜单一级</a></li>
        <li><a href="#">菜单一级</a></li>
        <li><a href="#">菜单一级</a></li>
        </ul>
</li>
<li><a href="#">菜单二级</a>
        <ul>
        <li><a href="#">菜单二级</a></li>
        <li><a href="#">菜单二级</a></li>
        <li><a href="#">菜单二级</a></li>
        <li><a href="#">菜单二级服</a></li>
        <li><a href="#">菜单二级</a></li>
        <li><a href="#">菜单二级</a></li>
        </ul>
</li>
<li><a href="#">菜单三级</a>
        <ul>
        <li><a href="#">菜单三级</a></li>
        <li><a href="#">菜单三级</a></li>
        <li><a href="#">菜单三级</a></li>
        <li><a href="#">菜单三级</a></li>
        </ul>
</li>
<li><a href="#">菜单四级</a>
        <ul>
        <li><a href="#">菜单四级</a></li>
        <li><a href="#">菜单四级</a></li>
        <li><a href="#">菜单四级</a></li>
        <li><a href="#">菜单四级</a></li>
        <li><a href="#">菜单四级</a></li>
        </ul>
</li>
</ul>
</body>
</html>

